/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlets;

import gestionnaires.GestionnaireCategoriesProduits;
import gestionnaires.GestionnaireProduits;
import java.io.IOException;
import javax.ejb.EJB;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


@WebServlet(name = "Categorie", urlPatterns = {"/Categorie"})
public class Categorie extends HttpServlet {
    @EJB
    private GestionnaireProduits gestionnaireProduits;



     /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        String nom = request.getParameter("nom");
        String numeroDePageString = request.getParameter("start");
        String actionPage = request.getParameter("actionPage");
       
        if(nom == null)
        {
           RequestDispatcher dp = request.getRequestDispatcher("index.jsp");
           dp.forward(request, response);
        }
        else{    
            int start,offset;
            
            if(actionPage !=null)
            {    
                if(actionPage.equals("pageSuivante"))
                {
                     start = Integer.valueOf(numeroDePageString)+8;
                     offset = 8;
                }
                else if(actionPage.equals("pagePrecedente"))
                {
                     start = Integer.valueOf(numeroDePageString)-8;
                     offset = start + 8;
                }
                else{
                    start = 0;
                    offset = 8;        
                }
            }
            else{
                    start = 0;
                    offset = 8; 
            }

            request.setAttribute("nomCategorie", nom); 
            request.setAttribute("nb_total", gestionnaireProduits.getNbProduitsByCategorieProduit(nom)); 
            request.setAttribute("start", start); 
            request.setAttribute("listeProduits", gestionnaireProduits.getProduitsByCategorieProduitByNom(start,offset,nom));      
            RequestDispatcher dp = request.getRequestDispatcher("index.jsp");
            dp.forward(request, response);
            }
        }
    

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
